Grading or separating machine.



s. MARSHALL. GRADING 0R SEPARATING MACHINE.

APPLICATION FILED DEC. 15, I915.

Patented Sept. 12, 1916.

2 SHEETSSHEET I.

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S. MARSHALL. v GRADING 0R .SEPARATING MACHINE APPLICATION FILED DEC. 15,1915.

Patented Sept. 12, 1916.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

SYLVESTER MARSHALL, OF ATHENS, OHIO.

GRADING OR SEPARATING MACHINE.

Application filed December 15, 1915.

To all whom it may concern Be it known that I, SYLVESTER MARSHALL, acitizen of the United States, residing at Athens, in the county ofAthens and State of Ohio, have invented certain new and usefulImprovements in Grading or Separating Machines, of which the followingis a specification.

My invention relates to machines for separating the largest grains ofwheat and the like from the smaller inferior grains.

The objects of the invention are to provide a simple and eflicientmachine for separating or grading out the largest grains for seedpurposes. Also to provide a machine of this character with an ordinarycircular sieve set with its axis at an angle of about 45; the mesh ofthe sieve being larger than the largest grains to be treated so that asthe mass of grain is elevated on the inclined sieve during the slowrotation thereof all of the smaller grains, and cockle, cheat, grit andthe like will readily fall through the sieve, while, owing to theinclination of the sieve, the largest and best grains only will remaintherein. Also to provide means for carrying off the smaller inferiormaterial which comprises from 30% to 50% of the whole amount byproviding the sieve below its reticulated bottom with a solid bottomhaving a marginal outlet. Also to provide the axis of the sieve withmeans for changing the inclination thereof. Also to provide duplicateconnected sieves having a common inclined axis and an of'ftake leadingfrom the marginal outlets. Also to provide the two screens with a commonaxially arranged discharge tube for the largest and best grains. Also toprovide means for lifting the seed grains and discharging them into saidaxial outlet; also to provide for lifting some of the mass of grain andallowing same to run down the inclined sieve. Also to provide a bagholder at the lower end of said axial outlet. These objects I accomplishby the construction shown in the accompanying drawing, in which;

Figure 1 is a perspective of my improved grader or separator. Fig. 2 isa longitudinal vertical section through the machine. Fig. 3 is asectional plan of one of the sieves with its discharge bucket in its twopositions. Fig. 4 is a detail of the connection between the base and thesieve axis.

A designates a suitable base, such as the Specification of LettersPatent.

PatentedSept. 12, 1916.

Serial No. 66,958.

of the sieves carried thereby may be changed.

C designates a discharge spout or tube secured by a clamp 0 to the bolto-r pin 6. To this spout C is secured a bag holder in the form of adouble hook C upon which a bag may be suspended to receive the grain orthe like.

D D designate the two sieves, which in practice may be ordinary No. 6sand sieves, which have about six meshes to the inch, and have the usualwood rims cl. Across the upper screen D extends a four-armed spider Dthe outer ends of which areibent down across the outer sides of the rimscl of both sieves to which they are secured by bolts or screws (Z. Atthe center of the sieves the inner ends of the spider merge into a shaft6Z2 which extendscentrally through both sieves and into the tubularbearing or axis B, in which it rotates. The sieves D D are alsoconnected together by the bars (Z secured at their ends to the sieverims, said rims also having inwardly extending annular flanges (Z toprevent overflow of the material being I treated.

The sieves D D have solid or imperforate metal bottoms D below theirreticulated bottoms and these bottoms D D have peripheral outlets (Z (Zopening into a discharge spout (Z secured to the outer sides of thesieve rims cl, so that every time the sieves make a complete revolutionand the outlets (Z reach their lowermost positions the material whichhas fallen through the sieves upon the bottoms D will run out into spoutcl and fall into any suitable receptacle placed therebelow.

The sieves and their metal bottoms have central openings and between theimperforate and to the reticulated bottoms are secured centrallyapertured spacing blocks D to give rigidity and strength thereto.

F are fixed lifting cups at opposite sides of the sieve rims to lift thematerial and then discharge it at the upper part of the inclined sieves.

E designates a central discharge tube secured at its upper end to thecentral part of spider D and extending down through both spacing blocksD* of the two sieves D D into the upper end of the discharge spout ortube C before referred to. The discharge tube E is provided within bothscreens with outlets 6, through which the perfect or seed grain isdischarged.

F F are buckets mounted at their inner ends upon a common shaft Fextending through both sieves and journaled at its upper end in one ofthe arms of spider D, the lower end of the shaft being journaled in thelower sieve bottom D These buckets F F are open at their forward sides7' and outer ends 7', while at their inner ends they are provided withshut-offs for the outlets of the discharge tube E. Normally theseshut-oils f are held over the outlets e by a spring f connected at oneend to the spider D and at the other end to the handle part 7 of theshaft F Beyond the shaft handle f an operating handle Gr is secured tothe spider arm so that while rotating the sieves to the right by handleG the operator may pull on handle f with one finger or the thumb and sothrow the buckets F F outwardly, which will bring their outer open endsf against the inner sides of the screen rims, move their shut-offs faway from the outlets c and throw inwardly the inner ends of the rearwalls f of the buckets until they rest against the discharge tube Ealongside of the rear edges of the openings 6. In this position as thesieves are turned to the right the buckets F F will gather the perfectgrains when they reach their lowermost positions and dis charge sameinto outlets 0 when said buckets reach their uppermost positions.

H is a funnel for supplying the lower sieve with material to be treated.

\Vhen the No. 6 sieves are set at an angle of 45 wheat may beeffectively graded, but it is manifest that by proper adjustment andproperly meshed sieves various materials may beseparated or graded. Soalso the number of sieves may be changed and they may be rotated by anysuitable means.

In practice the sieves are rotated to the right at about twenty times aminute and at this speed with the angle of 45 the grain will be liftedand spread out toward the left side of the sieves and form a V-shapedmass in the angle at the lower part of the sieves. As the sievescontinue to rotate some of the grain will be carried up by the buckets FF and cups F and discharged upon the upper part of the sieves. Thelargest and most perfect grains will not fall through, even thoughsmaller than the mesh of the sieves, but will gradually run down theinclined surface and force out the smaller grains. This will be kept upuntil the operator sees that he has just the quality of grain that hedesires to retain for seeding purposes. Then the bucket shaft handle fwill be pressed toward operating handle G, whereupon the buckets F Fwill gather up the grain and discharge it through the outlets e, whenceit passes to the tube E and discharge chute C.

My machine will remove all of the cockle from the portion graded out forseed and then the other or smaller grain may be run through the machineagain with the sieves set at a greater angle to separate most of thecockle remaining therein.

By having the mesh of the sieves larger than the greatest transversediameter of the largest grains to be graded it follows that the inferiorgrains will more readily fall through, while such largest grains willslide down by gravity over the sieve and any underlying grains withoutfalling through except to a very slight extent. Moreover, owing to sucha large mesh, the grain separated for seed purposes may all bedischarged through the sieve or sieves bv simply turning same down to ahorizontal position and vibrating said sieve or sieves a few times.

l/Vhat I claim is:

1. A grader or separator comprising, an inclined, rotary sieve formed ofa circular rim, and a flat reticulated bottom the mesh of which islarger than the greatest transverse diameter of the largest grains orparticles of the material to be graded, and means for adjusting thesieve from an inclined to a horizontal position; whereby the sieve whenrotated in an inclined position will allow all but the largest granularmaterial to pass through and when turned down to a horizontal positionwill allow the remaining material to run through.

2. A grader or separator comprising a suitable base or support, and arotary inclined sieve mounted centrally on the base or support andprovided above its bottom with an axially arranged outlet, and means forlifting the graded material and discharging it directly into saidoutlet.

3. A grader or separator comprising a suitable base or support, a rotaryinclined ieve mounted centrally on the base or support, and providedwith an axially arranged outlet, and a movable bucket mounted in thesieve and adapted at its inner end to open and close said outlet for thepurpose described.

4. A grader or separator comprising an inclined rotary sieve having acentrally arranged outlet, and a bucket pivoted within the sieve toswing at its outer end toward and from the rim of the sieve and at itsinner end into and out of register with the said outlet for the purposedescribed.

5. A grader or separator comprising an inclined rotary circular sieveprovided with a central tubular outlet having a discharge opening in itsside, and a bucket pivoted in the sieve to swing at its outer endagainst the sieve rim and having at the forward side of its inner end ashut-off to control said discharge opening and also provided at theinner end of its rear wall with an extension to engage the outlet tubeat the rear side of its opening to direct the graded material therein.

6. A grader or separator comprising an inclined rotary circular sieveprovided with a frame or spider, and a central discharge tube having anoutlet in one side, an operating handle on the spider, a handled shaftmounted in the spider near said operating handle, a bucket secured atits inner end to said shaft and having a shut-off at its inner end toclose said outlet opening, and a spring holding the shut-off normallyover said outlet; the inner end of the rear Wall of the bucket adaptedto engage the outlet tube in rear of its outlet opening when theoperator swings the outer end of the bucket toward the rim of thescreen.

7. A grader or separator comprisingan inclined, rotary, circular sieveprovided with an auxiliary bottom spaced from its sieve; a peripheraloutlet from the auxiliary bottom, a central tubular outlet from thesieve, and a manually operated swinging bucket controlling said centraltubular outlet.

3. A grader or separator comprising an inclined, rotary sieve formed ofa circular imperforate rim, and a flat reticulated bottom having acentral tubular outlet, and a manually controlled spring pressed bucketbetween the rim and outlet and controlling said outlet.

9. A grader or separator comprising a plurality of parallel connectedsieves, each having a circular rim, an inner reticulated flat bottom andan outer imperforate bottom, a central discharge tube extending throughsaid sieves and having an opening above the reticulated bottom of eachsieve; peripheral outlets being provided for the imperforate bottoms, arock shaft extending through both sieves, discharge buckets mounted onsaid shafts and at their inner ends controlling the outlets in saidcentral tube.

10. A grader or separator comprising a plurality of parallel connectedsieves set at an incline and provided with imperforate bottoms belowtheir sieve bottoms; discharge outlets at the peripheries of theimperforate bottoms, a spout connecting the said peripheral outlets, acentral discharge tube extending through the sieves and having outletopenings, spring pressed buckets in the sieves controlling the openingsin the central tube, a manually actuated connecting shaft for the saidbuckets, and an outlet chute below the sieves into which said centraldischarge tube leads.

11. A grader or separator comprising a base or support, a verticallyrocking bearing pivoted to said support, a rotary sieve having a centralaxis mounted at its lower end in said bearing, a central discharge tubeconcentric with said axis, an outlet chute mounted on the verticallyrocking bearing and into which the lower end of said central dischargetube leads, and a manually controlled bucket in the sieve controllingsaid central discharge tube.

12. A grader or separator comprising a rotary sieve formed of a circularrim and a flat reticulated bottom, means for holding said sieve at aninclination and means for adjusting the sieve from an inclined positionto a horizontal position.

13. A grader or separator comprising a plurality of parallel connectedsieves set at an incline and provided with imperforate bottoms belowtheir sieve bottoms; discharge outlets at the peripheries of theimperforate bottoms, a spout connecting the said peripheral outlets, acentral discharge tube extending through the sieves and having outletopenings, spring pressed buckets in the sieves controlling the openingsin the central tube, fixed cups on the inner walls of the sieve rims, amanually actuated connecting shaft forv the said buckets, and an outletchute below the sieves into which said central discharge tube leads.

In testimony whereof I affix my signature in presence of two witnesses.

SYLVESTER MARSHALL.

Vitnesses:

JOHN J. WooLLEY, C. M. GILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

